Rhodri the Great

Rhodri the Great (820-878) was King of Gwynedd from 844 to 878 (succeeding Merfyn Frych and preceding Anarawd ap Rhodri) and King of Powys from 855 to 878 (succeeding Cyngen ap Cadell and preceding Merfyn ap Rhodri).

Biography
Rhodri was the son of Merfyn Frynch, and he inherited Gwynedd upon his father's death in 844. Rhodri annexed Powys in 855 after the death of Cyngen ap Cadell, and he became the jure uxoris Prince of Seisyllwg in 872 as the husband of Angharad ferch Meurig. Rhodri and his brother Gwriad ap Merfyn were killed during an Anglo-Saxon invasion in 878.